15015 (136) Regolith Breccia
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Fact sheet
Description: 

15015 is a large glass covered breccia with a rind of glass on all sides. It is a shock melted soil breccia with low percentage of agglutinate and a high percentage of glass fragments including plastic forms, twisted and ropy forms, spheres and broken fragments. Glass compositions are of a wide range and include green volcanic glass typical of the Apollo 15 site. About 60% of 15015 is fine-grained dark matrix and includes an abundance of glass fragments. Lithic fragments of mare basalt, KREEP basalt, feldspathic basalt and granulite are reported.

The sample weighed 4770 grams before analysis. A fragment of KREEP basalt has been dated at 3.7±0.1 billion years (Ar/Ar).

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

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Not known
Ma = Millions of years ago
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metamorphic
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